Improvement in purifying rosin-oil



UNITED STATES PATENT OFFICE.

TORS OF LOOKS AND GANALS ON MERRIMAG RIVEl-t.

lMPROVEMENT IN PU RlFYlNG Rosin-cit.

Specification forming part of Letters Patent No. 9,680, dated April 19, 1-153.

To alljirlzom it may concern: I

Be it known thatI, SAMUEL L. DANA, ofthe city of Lowell, in the county of Middlesex and Commonwealth of Massachusetts, chemist, have invented a new and useful Preparation of Rosin-Oil, which I denominate the Deodor-- ized Rosin-Oil, the same being a'preparation ot' rosinoil free from the peculiar and oii'ensix'ep-tlor which characterizes the rosin-oil of commerce; and I do hereby declare that the following is a full and exact description of my process of making and preparing the same.

It is wellknown that rosin-oil is highly usefnl as a lubricating-oil" when combined with other oils; but when so used it gives out a pungent, peculiar, an d disagreeable odor,which remains long about the clothes and persons of those who are employed where it is used. My

invention consists of a preparation of rosin-oil free from this peculiar odor, and the following is the process by which I make it:

I combine the oily product of the distillation of rosin with an alkaline, earthy, or metallic base by heating in'an open kettle with constant stirring. I use and prefer lime fresh 'slaked, in the proportion of one pound, or

- hours a glutinous mass is formed at a. temperlime.

ature of about 360 Fahrenheit, which, on heiugallowed to cool, becomes a plastic substance, diaphorous in thin slices, flexible, and somewhat elastic. I then distil the compound thus formed. It the oil resulting from this distillation is not sut'liciently deodorized, I-redistill; but generally a second distillation is not necessary. By this process a rosin-oil is produced free from the peculiar and 'oftei'isiyc odor which characterizes the rosin-oil'of coinmeree, and lit to be combined withsperin or other oil for the purposes of lubrication.

I do not confine my claim to the use of lime as a base in the above process, although I prot'er it. Alumina, magnesia, potash, or soda, or oxide of lead maybe used in the proportion which their atomic weights bear to that of What I claim as my invention, and to have my assignees secure -by-Letter ent, isi The above-described process, or its equivalent, of preparing a rosin-oil free from the peculiar and ofl'ensive odor which characterizes the rosin-oil of commerce, by combining, as'above described, the fluid formed by the first distillation of resin or rosin-oil, however produced, with slaked lime or other alkaline, earthy, or metallic base equivalent thereto, as above described, a'ntl distilling from the compound. thus formed a deodorized preparation of rosin-oil, substantially in the manner above described. SAML. L. DANA.

Witnesses:

EDWARD TUFTS, JOHN (lmmon. 

